10 x 20" paper collage on board. We recommend considering purchasing the "Hovering Ruby-Throated Hummingbird" to make a diptych.  If you allow for 2" in between the works, the two panels together would be 22" wide x 20" high.
 
The source material Adams uses for her collages include found items from nature, textured papers, painted papers and exotic patterned papers that have been cut up, layered, and adhered with acrylic medium. Often, ten or more layers of material are used to create a single work. The result is a “painting” with a distinct, three-dimensional effect.